线阵CCD光谱采集系统的自适应滤波降噪  

Adaptive filtering denoising for linear CCD spectral acquisition system

作　　者：潘宇[1] 罗永道[1] 

机构地区：[1]云南师范大学物理与电子信息学院,云南昆明650500

出　　处：《光学仪器》2016年第2期167-172,共6页Optical Instruments

基　　金：国家自然科学基金(61168003)

摘　　要：为了便于对微型线阵CCD光谱采集系统采集的光谱数据进行分析,需要对光谱数据采集过程中出现的噪声进行降噪处理,以提高光谱数据的信噪比。首先,根据线阵CCD参数指标,设计了一种硬件降温结构,并用它对线阵CCD进行降温去噪。接着,根据递归最小二乘自适应滤波算法对采集好的水样品光谱数据进行去噪处理,然后和未去噪的水样品数据对比。实验表明,硬件电路降温去噪能够衰减线阵CCD上的暗电流噪声,使用递归最小二乘自适应滤波方法能够有效消减光谱采集系统中光谱数据的噪声。In order to analyze the spectral data collected by a linear CCD spectral acquisition system,it needs to solve the spectral noise that appeared in the process of data collection,to improve the signal-to-noise ratio of the spectral data.First,According to the linear CCD parameter,we design a kind of cooling hardware structure and use it to cool the denoising linear CCD.At the same time,based on recursive least square adaptive filter algorithm,water sample spectral data is dealt with to compare with the noise of water sample data.Experimental results indicate that hardware circuit denoising is not able to completely remove the thermal current on the linear CCD noise.Using the recursive least square adaptive filter method can effectively reduce noise in the spectrum acquisition system.

关 键 词：光谱学 线阵CCD 自适应滤波 去噪 

分 类 号：O433.4[机械工程—光学工程]